Subaru Forester Owners Forum banner
1 - 16 of 16 Posts

·
Registered
2013 Forester 2.5X, 4AT
Joined
·
72 Posts
Discussion Starter · #1 ·
Hi all,

Started a motor swap and thought I would post the progress and details to help future novices like myself

Issue:
2013 motor with ~190k miles on it, low compression, misfiring cylinder 4, drinks about a quart of oil every 300 miles
Confirmed with a shop that a new motor is needed
2013 Forester motors are expensive and hard to come by with low miles

Solution:
Standing on the shoulders of giants here as people have noted success with replacing the existing FB25 motor with a newer motor from a Legacy. 2016 seemed to have a lot of wrecked cars with low miles
First motor I ordered off eBay came with cracked case so I sent it back
Second motor I ordered came from LKQ (purchased through eBay as well, provides more protection in case what they send is bad)
The motor I received had some damage to the air intake manifold. One of the vacuum stubs (?) is broken off, going to try and JB weld it back on

Motor removal:
I purchased a service manual off eBay, instructions were pretty good and gave me some confidence on what needed to be removed. I did not have to remove the AC hoses / evacuate the AC lines like in the manual, can just move this off to the side

In addition to basic hand tools I would highly recommend borrowing / buying a stubby electric impact wrench. I was using some old air impact wrenches and they are a little too bulky to get into some spaces

Tools used:
Socket set​
Various extensions and wobbles to get at weird angles​
PB blaster​
Impact wrench​
Breaker bar would be very helpful - I used metal pipe off the car jack to get more leverage​
Engine hoist​
Floor jack​
Flood light to see things​
Various pliers​
Fuel quick disconnect tool​
Something to catch oil and radiator fluid with​
Empty containers to recycle fluids​

Optional:
Extractor sockets (rounded a bolt and had to buy this to get it out)​
Blow torch to heat up bolts / nuts that were stuck​
YouTube - searched Subaru engine removal, some really helpful videos​
Lots of blue shop paper towels​
Simple green and brake cleaner to clean parts as you go​

Words of advice:
Take the radiator out before trying to get the power steering bracket off, will allow to you get at the bottom bolt straight on and not round off the nut (on the 2016 the nuts are deeper)​
Make sure to disconnect the flex plate from the torque converter! These bolts are not visible so could be an easy step to miss​
Take the intake manifold off when you are separating the flex plate from the torque converter, makes it way easier to see what you are doing​
Next steps are to swap parts between the motors where needed, from what I have read:
Clean parts as needed, especially the condenser and radiator​
Flex plate (confirmed they are different size between 2013 and 2016)​
Wiring harness (wiring harness connection to the car is different between the two)​
Sensors? Not really sure what sensors need to be changed but any input would be helpful​
Coil packs (modified with boot from 2016)​
Timing cover? Unclear if this is needed​
Something with extra cooling line to CVT that my Forester doesn't have, haven't figured this out yet or where this, picture below​
Motor is out! Took me 4 evenings of slowly working as I hit road blocks such as nut rounded off and had to go buy a fuel disconnect tool
Motor is out!

Picture of the motor safely out of the car​
2013 motor safely out
New 2016 motor​
2016 motor
Different intake manifold and coolant routing, I think the red circles are suppose to go to the CVT on the newer models - can anyone confirm?
2016 back of motor, unsure on these hoses



2013 Forester motor for reference
2013 motor back, just a straight tube


I'll continue to update as I go along, if anyone has done this before and has additional advice please feel free to comment!
 

·
Administrator
Joined
·
18,665 Posts
@ej22 I see the A/C compressor is properly seated :)
I'm wondering if this is better off being a "Members Journal" so it does not get lost? I look forward to the progress.
Also could you please complete your Public Profile; vehicle details at least; thanks. For detail instructions pls refer: Your forum "Public Profile" - how to fill this...
 

·
Registered
2013 Forester 2.5X, 4AT
Joined
·
72 Posts
Discussion Starter · #3 ·
@Kevin

Hahaha I knew there was pun in there somewhere.

I fine with it being a members journal. Ive added some vehicle details to my public profile.
 

·
Registered
2013 Forester 2.5X, 4AT
Joined
·
72 Posts
Discussion Starter · #5 ·
I made a table to keep track of some of the parts I might need to change between the 2013 and 2016 motors, Ill update as I go along. Unclear if I need to swap out the crankshaft position sensor or not. (numbers sourced from Rock Auto)
CategoryDescription2013 Forester2016 Legacy/OutbackSame?Notes
IgnitionIgnition coils22433AA63022433AA70ANoSwap boots and springs from 2016 to the 2013 ignition coil
IgnitionSpark plugs22401AA78022401AA780YesUsing newer plugs from 2013
IgnitionCamshaft position sensor22056AA27022056AA270YesUsing one from 2013 as one from the 2016 is busted
IgnitionCrankshaft position sensor22053AA052, 22053AA05322053AA070, 22053AA071NoNeed to swap out?
WiringWiring harnessNANANoSwap to 2013 wiring harness to 2016
Belt driveBelt Tensioner23769AA05A23769AA05AYesUse belt tensioner from 2016
Cooling systemTemperature sensor22630AA14022630AA17ANoSwap in 2013
EngineVariable Valve Timing Solenoids10921AA220, 10921AA230, 10921AA23110921AA220, 10921AA230, 10921AA231Yes
EngineKnock / Detonation sensor220601HC0A, 22060AA160, SU00300415220601HC0A, 22060AA160, SU00300415Yes
EngineMAP Sensor22627AA510, 227187, SU15326}22627AA510, 227187, SU15326Yes
EngineMAF Sensor22680AA380, 22680AA38A22680AA380, 22680AA38AYesUsing 2013 anyways
EngineHarmonic Balancer12305AA37012305AA370YesMight swap to new one? Visually they look different
EngineFlex plate12332AA17012332AA150No2016 is smaller, use 2013
ExhaustO2 Sensor, downstreamMaybeWalker products have the same part numbers others are different, reusing sensors anyways
ExhaustO2 sensor, upstreamMaybeWalker products have the same part numbers others are different, reusing sensors anyways
Fuel & AirFuel injectors16611AA82016611AA88ANoI think I just keep the 2016 fuel injectors in
 

·
Registered
2013 Forester 2.5X, 4AT
Joined
·
72 Posts
Discussion Starter · #6 ·
Got the timing cover off and all cleaned up to be swapped...and just realizing I haven't cleaned the front of it yet
554109
 

·
Registered
2013 Forester 2.5X, 4AT
Joined
·
72 Posts
Discussion Starter · #7 ·
Got the flex plate changed over and the ignition coil from the 2013 (boots and spring from the 2016). I ended up keeping the crank sprocket / crankshaft position sensor from the 2016 motor as the bolt to connect the sensor is on the opposite side. Hoping the connector from the 2013 fits the 2016, they look close...

Crank sprocket comparison - top one is from the 2016.
554150


Flex plate from the 2013 motor installed - 22 ft-lbs of torque on each bolt then an additional 30 degrees

554151


Ignition coils from the 2013 motor installed with the 2016 boots and spring. Used some washers and a longer bolt - 4 washers and 4 M6 X 30 bolts. The boot from the ignition coil pulls off / gotta work it off a little bit.


554152
 

·
Registered
2013 Forester 2.5X, 4AT
Joined
·
72 Posts
Discussion Starter · #10 ·
They are real close and I did read one account of someone making it work with a different belt. I believe the main difference is there is an extra pulley on the 2013 and power steering bracket is different (haven't confirmed yet). From looking and what I have read the idler pulley's are different

2013

554260


2016

554262
 

·
Registered
2013 Forester 2.5X, 4AT
Joined
·
72 Posts
Discussion Starter · #12 ·
Slight update...havent had much time to work on the swap, but ended up using the 2013 crankshaft position sensor and bracket. I think they are basically the same but don't want to have to pull the motor again if it does need to be swapped. Hoping to finish up the wiring tomorrow and drop in.
 

·
Registered
2012 Forester X Auto
Joined
·
2,762 Posts
Is there a difference in the ECU between the two?
I'm thinking the 2013 doesn't have VVT and the 2016 does and I didn't see any reference to that..
I hope it goes well for you.
 

·
Registered
2013 Forester 2.5X, 4AT
Joined
·
72 Posts
Discussion Starter · #14 ·
@DragonSubie7 Thanks! I'm learning a lot along the way haha. There is probably some difference between the ECUs, but both are FB25s with VVT.
 

·
Registered
2013 Forester 2.5X, 4AT
Joined
·
72 Posts
Discussion Starter · #16 ·
Got the motor in and it's running. Running into a TGV issue now (2016 are not the same as 2013!). One interesting thing is the new gaskets for the exhaust manifold smoked heavily on the first start up which was surprising (at least I am hoping that was what was smoking).
 
1 - 16 of 16 Posts
Top